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Model DM25 Steam Trap

Features

  • Single blade element
  • Stainless steel internals
  • Built in strainer & check valve
  • Modulating discharge
  • Continuous air & CO2 venting
  • Fast start capabilities
  • No loss of live steam

Description

Max. Differential Pressure - 320 PSI

Line sizes  
Model DM25 1/2", 3/4"
End connections threaded (BSP, NPT) socket weld or flanged
   
Materials  
Body & Cover: Forged carbon steel
Valve Seat: Stainless steel
Valve Cone: Stainless steel
Strainer: Stainless steel
Bimetal: Stainless steel
Nuts & Bolts Steel
Gasket: Flexible graphite
   
Mounting  
From horizontal to vertical. Self draining and freeze resistant when mounted in vertical position.


 

Operation

On initial start up the steam system, large amounts of cold condensate and air are present in the system. At this point the bimetallic strip of the delta element relaxes and fully opens the valve assembly to quickly expel the high volume of non-condensate gases and cold condensate through the discharge port.

As the element senses an increase in the condensate temperature the bimetal expands and raises the stem to modulate the flow. Just below the temperature of saturated steam the seat will close tightly to prevent live steam from discharging.

Application

Bestobell model DM25 is a light performance,energy efficient steam trap that incorporates a 'Y' type strainer and integral check valve. It provides long term reliable service on steam main dripleg and critical tracing applications with differential pressures up to 320 PSI.
Size
A
B
C
D
E
WT
1/2"
4"
5"
3 1/4"
3 1/4"
2 1/4"
5.5lb
3/4"
4"
5"
3 1/4"
3 1/4"
2 1/4"
5.5lb

Capacity chart: Condensate Capacity (1b/hr) at Pressure Differential

Size
PSI Differential
50
100
120
150
200
250
300
320
1/2"
Cold start up
Hot Running Load
1500
70
1950
80
2050
85
2200
90
2400
100
2600
105
2700
110
2800
110
3/4"
Cold start up
Hot Running Load
1500
70
1950
80
2050
85
2200
90
2400
100
2600
105
2700
110
2800
110
 
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